If the world gets cold, I'm sure I wouldn't make it, they would find me freezing to death, I can imagine the cramps, my whole body numb and possibly delirious, I don't think there is a person who can withstand as much cold as penguins. However, if there is time to find shelter, food and adequate clothing to withstand the cold, I could possibly survive.
Being sensitive to the cold I would not like that moment to come, but if I have to live the experience I would have to adapt and wear appropriate clothing to protect me from the cold.